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| Title | Structural basis for the pore-forming activity of a complement-like toxin. |
|---|---|
| Journal, issue, pages | Sci Adv, Vol. 11, Issue 13, Page eadt2127, Year 2025 |
| Publish date | Mar 28, 2025 |
Authors | Bronte A Johnstone / Michelle P Christie / Riya Joseph / Craig J Morton / Hamish G Brown / Eric Hanssen / Tristan C Sanford / Hunter L Abrahamsen / Rodney K Tweten / Michael W Parker / ![]() |
| PubMed Abstract | Pore-forming proteins comprise a highly diverse group of proteins exemplified by the membrane attack complex/perforin (MACPF), cholesterol-dependent cytolysin (CDC), and gasdermin superfamilies, ...Pore-forming proteins comprise a highly diverse group of proteins exemplified by the membrane attack complex/perforin (MACPF), cholesterol-dependent cytolysin (CDC), and gasdermin superfamilies, which all form gigantic pores (>150 angstroms). A recently found family of pore-forming toxins, called CDC-like proteins (CDCLs), are wide-spread in gut microbes and are a prevalent means of antibacterial antagonism. However, the structural aspects of how CDCLs assemble a pore remain a mystery. Here, we report the crystal structure of a proteolytically activated CDCL and cryo-electron microscopy structures of a prepore-like intermediate and a transmembrane pore providing detailed snapshots across the entire pore-forming pathway. These studies reveal a sophisticated array of regulatory features to ensure productive pore formation, and, thus, CDCLs straddle the MACPF, CDC, and gasdermin lineages of the giant pore superfamilies. |
External links | Sci Adv / PubMed:40153490 / PubMed Central |
| Methods | EM (single particle) / X-ray diffraction |
| Resolution | 2.49 - 6.5 Å |
| Structure data | ![]() EMDB-45448: Double-stacked pore and prepore-like complex (C1 symmetry) ![]() EMDB-45449: Double-stacked pore and prepore-like complex (C30 symmetry) ![]() EMDB-45450: EaCDCL pore complex (C1 symmetry) EMDB-45451, PDB-9ccp: ![]() EMDB-45452: Prepore-like EaCDCL short oligomer (C1 symmetry) EMDB-45453, PDB-9ccq: ![]() EMDB-45454: EaCDCL pore complex, non-stacked control (C1) ![]() EMDB-45455: EaCDCL pore complex, non-stacked control (C30 symmetry) ![]() PDB-8g33: |
| Chemicals | ![]() ChemComp-HOH: ![]() ChemComp-CA: |
| Source |
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Keywords | TOXIN / Pore-forming toxin / cholesterol-dependent cytolysin like / Elizabethkingia anophelis / MACPF / complement |
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elizabethkingia anophelis ag1 (bacteria)
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